Pronóstico: Highest temperature in Shenzhen on July 21?

Platform comparison

Market context

Shenzhen's peak temperature on 21 July 2026 will be measured at Bao'an International Airport Station and resolved against historical Weather Underground data. The market currently prices all temperature ranges at 0% probability on Polymarket, suggesting either a data lag or settlement mechanics awaiting activation. Traders will need USDC on Polygon to enter positions once the conditional token pairs activate, with resolution occurring at 12:00 UTC on the settlement date itself—meaning real-time temperature readings from the airport station will determine which bracket captures the highest recorded value that calendar day.

Shenzhen's July climate is remarkably consistent. Historical data from Bao'an shows peak temperatures between 32–35°C during mid-to-late July, with extreme heat occasionally pushing toward 36–37°C during particularly intense heatwaves. The 2022 summer saw several days exceed 35°C, whilst 2023 remained closer to the 33–34°C range. This narrow band reflects the subtropical monsoon pattern that dominates the Pearl River Delta region, making July one of the most predictable months for temperature ranges rather than outlier events.

The key variable is whether tropical cyclone activity disrupts normal patterns. The Western Pacific typhoon season peaks in August–September, but early-season systems occasionally affect southern China in late July, typically lowering daytime highs by 2–4°C through cloud cover and precipitation. The China Meteorological Administration issues seasonal forecasts in June; traders should monitor their July outlook for any signals of abnormal weather systems. Beyond that, the measurement itself depends entirely on Bao'an's official recording station, which has operated consistently for decades and feeds directly into Weather Underground's historical database.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Qué Es, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.